NPK International Inc.
NPKIFigures shown here come from public SEC filings. Dates beside each section show the available history.
How NPK International Inc. Makes Money
Follow each dollar of revenue through to what shareholders keep.
From revenue to net income
Pick a year or quarter. Each band's width is its dollar amount.
Financial Summary
Choose a year or quarter, compare it with the same period a year earlier, and open any row for its full filing history.
Loading financial history…
SEC filings supply these figures; updates after the dates shown are not included. This page includes 17 annual periods. The latest annual period ends Dec 31, 2025. The latest insider filing shown is dated Jun 9, 2026. The latest institutional report shown is dated Mar 31, 2026; other ownership filings may exist.
Ownership
Who holds the shares, as reported in SEC ownership filings.
Reported 13F positions
Each row shows what a filer reported for one date, not a current position. The link opens that filing.
| Filer | Report date | Shares | Value | Filing |
|---|---|---|---|---|
| PRICE T ROWE ASSOCIATES INC /MD/ | 2026-03-31 | 74,766 | Not shown | SEC filing |
| OSAIC HOLDINGS, INC. | 2026-03-31 | 8,375 | $121K | SEC filing |
| Russell Investments Group, Ltd. | 2026-03-31 | 1,726,243 | $25M | SEC filing |
| VOYA INVESTMENT MANAGEMENT LLC | 2026-03-31 | 14,219 | $206K | SEC filing |
| Erste Asset Management GmbH | 2026-03-31 | 0 | $0 | SEC filing |
| Magnetar Financial LLC | 2026-03-31 | 16,993 | $246K | SEC filing |
| Roubaix Capital, LLC | 2026-03-31 | 269,935 | $3.91M | SEC filing |
| Penbrook Management LLC | 2026-03-31 | 67,250 | $974K | SEC filing |
| Panoramic Capital, LLC | 2026-03-31 | 127,754 | $1.85M | SEC filing |
| WASATCH ADVISORS LP | 2026-03-31 | 2,899,021 | $42M | SEC filing |
| Optiver Holding B.V. | 2026-03-31 | 366 | $5.3K | SEC filing |
| GROUP ONE TRADING LLC | 2026-03-31 | 993 | $14.4K | SEC filing |
| Tieton Capital Management, LLC | 2026-03-31 | 835,920 | Not shown | SEC filing |
| Creative Planning | 2026-03-31 | 52,158 | $756K | SEC filing |
| Rothschild Wealth LLC | 2026-03-31 | 17,715 | $257K | SEC filing |
| Electron Capital Partners, LLC | 2026-03-31 | 1,099,943 | $15.9M | SEC filing |
| Essential Partners LLC | 2026-03-31 | 158 | $2.29K | SEC filing |
| JPMORGAN CHASE & CO | 2026-03-31 | 207,952 | $2.96M | SEC filing |
- Each value is checked against NPK International Inc.'s share prices from within about three months of its report date (insiders' Form 4 trades and the latest close).
- Value not shown for 2 rows: the filed value is about 1,000 times too small for the share count at NPK International Inc.'s share price.
- 2 rows left out: the value per share they report is far from NPK International Inc.'s share prices on file from around the report date, far from the value most filers reported for that date, or the value of a security already left out, so they may describe another security or share class.
120 filers have only one report here.
Unusually large insider trades
Each trade is compared with the other insider trades of the same kind in the same security among NPK International Inc.'s recent filings on file. Size alone is context, not a prediction or evidence of improper trading.
- 2026-06-03 · LANIGAN MATTHEW: Larger than all 20 other insider sales of Common Stock on file. SEC filing
- 2026-03-04 · Piontek Gregg: Larger than 19 of the 20 other insider sales of Common Stock on file. SEC filing
- 2025-08-22 · LANIGAN MATTHEW: Larger than 18 of the 20 other insider sales of Common Stock on file. SEC filing
Purchases & sales (open market or private)
| Security | Code | Price | Filing | |||
|---|---|---|---|---|---|---|
| 2026-06-08 | Briggs Lori · VP & President, Ind. Solutions | Common Stock | S — Open market or private sale | −8,325 | 14.75 | SEC filing |
| 2026-06-03 | LANIGAN MATTHEW · President & CEO | Common Stock | S — Open market or private sale | −167,375 | 14.43 | SEC filing |
| 2026-06-02 | Briggs Lori · VP & President, Ind. Solutions | Common Stock | S — Open market or private sale | −10,446 | 14.58 | SEC filing |
| 2026-05-15 | Lewis Michael A · Director | Common Stock | S — Open market or private sale | −2,013 | 15.30 | SEC filing |
| 2026-04-09 | Piontek Gregg · Senior Vice President and CFO | Common Stock | S — Open market or private sale | −15,000 | 15.05 | SEC filing |
| 2026-04-01 | Piontek Gregg · Senior Vice President and CFO | Common Stock | S — Open market or private sale | −35,000 | 14.51 | SEC filing |
| 2026-03-25 | Piontek Gregg · Senior Vice President and CFO | Common Stock | S — Open market or private sale | −15,000 | 15.03 | SEC filing |
| 2026-03-16 | Fruge Mary Celeste · VP, General Counsel | Common Stock | S — Open market or private sale | −1,000 | 13.56 | SEC filing |
Showing 8 of 15 rows
Grants, exercises, tax & gifts
| Security | Code | Filing | |||
|---|---|---|---|---|---|
| 2026-06-01 | Briggs Lori · VP & President, Ind. Solutions | Restricted Stock Units | M — Exercise or conversion of derivative security | −24,340 | SEC filing |
| 2026-06-01 | Piontek Gregg · Senior Vice President and CFO | Restricted Stock Units | M — Exercise or conversion of derivative security | −40,379 | SEC filing |
| 2026-06-01 | LANIGAN MATTHEW · President & CEO | Common Stock | M — Exercise or conversion of derivative security | +100,188 | SEC filing |
| 2026-06-01 | Piontek Gregg · Senior Vice President and CFO | Common Stock | M — Exercise or conversion of derivative security | +40,379 | SEC filing |
| 2026-06-01 | Briggs Lori · VP & President, Ind. Solutions | Common Stock | M — Exercise or conversion of derivative security | +24,340 | SEC filing |
| 2026-06-01 | Fruge Mary Celeste · VP, General Counsel | Restricted Stock Units | M — Exercise or conversion of derivative security | −17,274 | SEC filing |
| 2026-06-01 | Fruge Mary Celeste · VP, General Counsel | Common Stock | M — Exercise or conversion of derivative security | +17,274 | SEC filing |
| 2026-06-01 | LANIGAN MATTHEW · President & CEO | Restricted Stock Units | M — Exercise or conversion of derivative security | −100,188 | SEC filing |
Showing 8 of 31 rows
These tables describe filed transactions, not current holdings. Prices are shown as filed; a currency is added only when the filing's data names one. Amended and possible duplicate rows are left out of size comparisons and transaction groups.